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From Guided Wave Incorporated
NIR has been traditionally viewed by spectroscopists trained in laboratory methods as a less-than-useful spectral region that exists to fill the gap between the UV/VIS and IR regions. NIR peaks are broad, overlapped and much weaker than their IR counterparts. So, why has NIR become so widespread in process analysis? Interest in NIR grew quickly in the 1980s due to the advent of fiber optics, bright light sources and sensitive detectors. NIR also solved some of the difficult sampling techniques characteristic of IR, because NIR optical paths through liquid samples may be millimeters or even centimeters, rather than microns. As a result, first commercial fiber optic spectrophotometers were introduced in the 1980's. Products & Services
Turbidity instruments measure the average volume of light scattering over a defined angular range. Both particle size and concentration of suspended solids as well as dissolved solids can affect the reading.
Water quality photometers and colorimeters are ion-specific, computer-interfaced probes that are designed to determine the concentration of a solution from its color intensity.
Fiber optic probes collect light or spectra from extreme environments inside reaction vessels at high temperatures or pressures. Product types include UV-Vis spectroscopy probes, Raman spectroscopy probes, and refractometry probes.
Gas and air instruments detect, monitor or analyze gases present in an environment.
Photometers produce electrical signals, which correspond to radiant flux energy, for a series of discrete wavelength intervals. They are used to measure wavelengths of light spectra and optical or atomic emissions.
Product Announcements
Topics of Interest
Near infrared (NIR) is not commonly associated with on-line analysis of process gasses in comparison to infrared (IR) and the ubiquitous, but maintenance-intensive gas chromatograph (GC). The purpose...
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The measurement of low levels of water in hydrocarbon solvents is critical to many chemical processes. This note discusses the measurement of the water concentration in using fiber optic-based,...
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An important characteristic of a fatty oil product is its iodine value (IV). This is a measure of the unsaturated fatty acid content and indicates the ease of oxidation or the drying capacity of the...
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Purpose: Measurement of water in a multiple alcohol and brine solution with a ChemView® photometer. Experimental: PS-2E fiber optic diode array NIR spectrometer, 2 m low-OH optical fibers,...
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The use of near-infrared (NIR) spectroscopy in the pharmaceutical industry has grown rapidly in the past decade. The IMV-4000 Infrared Multichannel Viewer integrated with a NIR capable FT/IR-4000 or...
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